Pipeworking machine



May 4, 1937. R. B. PEALER PIPEWOR KINQ MACHINE Filed Dec. 26, 1935 4Sheets-Sheet l INVENTOR.

I ATTORNEY-5'.

May 1937'. R. B. PEALER PIPEWORKING MACHINE 4 Sheets-Sheet 2 Filed Dec.26, 1935 ATTORNEYS y 1937. v R. B. PEAL ER 2,079,179

'PIPEWORKINQ MACHINE Filed Dec. 26, 1955 4 SheetsSheet 3 INVENTOR.

BY 5mg WM;

ATTORNEYi May 4, 1937. R. B. PEALER PIPEWORKING MACHINE 4 Sheds-Sheet 4Filed Dec. 26, 1955 Bevel/1h; outs/dc INVENTOR. ffi m '73. @w;

@015 QMWM WM ATTORNEYS.

' Patented May 4, 1937 PATENT OFFICE PIPEWORKING MACHINE Robert B.Pealer, Warren, Ohio, assignor to BeaverPipe Tools, Inc., Warren, Ohio,a corporation of Ohio Application December 26, 1935, Serial No. 56,145

3 Claims.

This invention relates to a power machine for performing operations onpipes and is of the type where the pipe is mounted in a chuck rotated bypower and the working tool is mounted on 5 aslidable carriage. Suchworking tool may comprise a group of chasers to thread the pipe, a

cutterto cutit off, or a reaming tool. Preferably,

the carriage carries all of such tools, any or all of which may beused-for action on the pipe without changing its' position in the chuck.

My invention is in the nature of an improvement on the invention shown,described and claimed in my prior Patent 1,947,874, issued February 20,1934, to my assignee The Borden Company, now named'Beaver Pipe Tools,Inc. One

of the objects of the present invention is to simplify and cheapen theconstruction of the carriage over that shown in such patent.

Another object of this invention is to provide a self-centering cutterhaving a rolling knifeopposed by bearing rollers, which is accordinglycheaper and more readily adaptable for various sizesof pipe than theknife. cutters shown in the patent mentioned.

Anotherobject is to provide a reaming tool permanently carried bythe-carriage'and adapted to be manually brought into engagement with thepipe'whenever desired to ream out the internal fin which may be causedby the cutter. Still another object is toarrange the reamer so that itmaybe utilized to form a bevel on the exterior" of the pipe.

"My invention comprising the means by which I attain the above objects,or any ofthem, will be more apparent from the following detaileddescription of a" preferred embodiment of the in- ,vention shown in thedrawings hereof. I In the drawings, Fig. 1 is a side elevation of mycomplete .pipeworking tool; Fig. 21s a vertical longitudinal sectionthereof; Figi 3 is an end view; Fig.4is a perspective of the pipecuttingunititself; Fig; 5. isa perspective of the carriage withthethreadingunit and the-pipe cutting unit removed; Fig. fi is'a verticalsection onthe line ii-Eon Fig. 1 showing the carriage in end view; Fig.7 is aface view of a pipe threading unit whichis identical withthat ofthe prior patent i l and may beemplo edon the carriage of thisapplication. j v

- Briefly, the. entire machine shown in Figs. 1 and 2 may comprise aframe) carrying an overhanging bed H a driving motor 15 supported on thebed ilk-a rotating chuck mounted in a hollow standard which houses'reduction geari-ng" -connectingthe motor to the chuck, and a carriage 50slidably mounted on the extension bed H and carrying the pipe-workingtools.

The chuck 20 is of any suitable form-adapted to clamp a pipe,illustrated at A in Figs. 1 and 2. The pipe is shown also as restingbehind the 5 chuck on a pipe rest 40 mounted on a standard 41 ofinverted U-shape, which is secured to the bed and extends over the motorand carries the motor-controlling switch 42.

The extension frame ll isan open trough-like member having a pair ofinwardly projecting ledges l2 at the top of its side walls shown inFigs. 2 and 6. The carriage, shown in perspective in Fig. 5, is acasting approximately in the form of a horizontal U, thus providing twostraight base, portions 5| connected by a yoke portion 52. The baseportions rest on the top of the extension frame H and are longitudinallyrabbeted so that theyextend down-and along the inner faces of the ledges12, as shown at 54. To the bottom of the portions 54, I boltlongitudinal strips 55, which underhang the ledges l2, thus slidablyattaching the carriage to the extension bed, while enabling. its removalif desired.

Extending forwardly and downwardly from the carriage frame is a' bracket56, which may be an integral part of the casting and which carries aforwardly extending tubular boss 51. Mounted in thisboss is a shaft 60to the outer end of which is secured a suitable hand-wheel 6|; on 30 theinner end of the shaft is a spur pinion 62 meshing with a downwardlyfacing stationary rack63 formed on thefront wallof the extension -bed-II. This construction enables the carriage to bemoved toward and fromthe chuck as desired. a

The carriage. 50 includes two upstanding posts or standards 10 havinghorizontally extending heads -'ll. These heads have on their facestoward the chuck suitable means for carrying the threading unit. Asshown, this comprises horizontalweb-like portions 12 and horizontal ears13 above such web-like portions, aligned-openlugs 14 being made' throughthe web portions and ears. The threading unit may comprise. a ringcarrying radial chasers and having diametrically opposed horizontallyextending perforated ears which occupy the ways between the webs I2 andthe ears 73 of thecarriage and may be locked thereto by vertical pinspassing through the openings 14 of the carriage andthe openings of thechaser ring ears. 7 r

The chaser ring may carry fixed chasersQthere being a different ring foreach size of pipe,-or,-if desired; the chasersmay be adjus'tably mountedin the chaser carrying ring, as set out in my patent referred to and asillustrated herein in Fig. '7, and hereinafter described in detail.

The two post heads 'II, on the opposite side 5 from the chaser carryingways, have horizontal ways in which the cutter frame is mounted; that isto say, on the head II at the top of each post 18 is a horizontal grooveI6 restricted at the entrance by rib-like portions 11 and I8. The pipe10 threading unit shown in Fig. 4, and designated as a whole by thenumeral 88, has T-shaped ribs 5 8| and 82 slidably occupying theguideway provided by the undercut grooves 16.

Describing the cutting unit more specifically, I 15 provide a block 83carrying the rib 8| and having an internal recess in which is mounted apipecutting wheel 85, and a block 86 carrying the rib 82 and having arecess in which are mounted a pair of pipe bearing rollers 81. Therollers 87 28 and the wheel 85 are of standard construction for theusual hand pipe cutter, and are mounted in their respective recesses onpins as 88, which pass freely through one portion of the block and arethreaded near their free ends to screw into the 5 block at the otherside of the recess in the usual manner.

7 Each of the blocks 83 and 86 is formed on its upper and under-surfacewith tubular extensions 98; occupying these extensions are horizontal .3rods 9|, the forward ends of which pass also through a yoke 92. Nuts 83and 94 are secured to the ends of the rods on the outer side of the.yoke and the block 86, respectively. The yoke 92 has a tubular boss 95in which is rotatably 3 mounted a shaft 96 which has external threadsengaging internal threads in the block 83. Mounted on the outer end ofthe shaft 96 is a hand-wheel 91. The block 33 is slidable on the rods98, and, accordingly, when the hand wheel 91 40 is turned the blocks 83and 86 are caused to approach each other or separate according to thedirection of turning of the hand wheel, the blocks being freely slidablein the ways in the heads II of the carriage posts I8, so thatirrespective of the 45 size of the pipe, the cutting wheel and thrustrollers will bear against the pipe with equal pressure. When no pipe ispresent, the whole cutting unit may be shifted back and forth and mayhave its opening enlarged or reduced by rotating the 50 hand-wheel; thenwhen the pipe is in place between the knife and bearing rollers, theturning of the hand-wheel to cause the engagement of the knifeautomatically centers the cutting tool, the rollers comingsimultaneously into engagement 55 with the other side of the pipe. Asthe pipe con- 65 I6, in the head II of the carriage which carries theblock 86, occupies the slot I8 I. This limits the sliding movement ofthe block 86 between the position suitable for the smallest pipe to becut and that for the largest pipe, and thereby pre- 10 vents the cuttingunit being inadvertently disconnected from the carriage. However,whenever desired, the removal of the screw holding the block I82 enablesthe whole cutting unit to be removed.

75 The reaming unit comprises a lever I 8 (Figs.

2 and 5) pivoted at I II to ears I I2 rising from the carriage, thelever extending across the carriage and terminating in a handle portionH2 in a convenient location back of the hand wheel 6I. Bolted to theface of the lever, on the side toward the chuck, is a reaming cone II5which has ratchet-like cutting ribs usual with pipe reamers. This coneis shown in Fig. 2 as having a parallelsided boss I I 4 on its headoccupying a correspondingly shaped recess in the lever H8, and is heldin place by a screw bolt II6 passing through the lever into the cone.The lever normally rests in the position shown in Fig. 5, with theintermediate portion of the lever and the cone well below the region ofthe largest pipe, but with the handle II2 held sufficiently above thecarriage frame by a lug I I 8 on the lever so that the handle may bereadily grasped.

When it is desired to ream a pipe, as, for instance, to remove theinterior fin formed by the cutting wheel, the carriage is moved by itshand wheel 6I until the reamer is beyond the end of the pipe, then thereamer lever is lifted into the position shown in full lines in Fig. 6,that is, in

axial alignment with the pipe; then the carriage is returned to bringthe reaming cone into the pipe, which, being rotated by the chuck, iseffectively reamed. I

In my machine the same reaming tool may be used to bevel the exterior ofthe pipe; that is to say, when the lever is in its normal position ofrest as shown in Fig. 5, the carriage may be positioned so that anintermediate portion of the length of the reamer cone lies directlybeneath the end of the pipe, and then the lever may be raised into suchposition as indicated in broken lines in Fig. 6, where the non-rotatingcone engages the exterior of the rotating pipe and is thus effective tobevel the end thereof.

The boss H4 on the reamer cone has been described as parallel sided, andas occupying a similar recess in the lever, preventing the conerotating. This ,construction, however, enables the cone to have twodifferent positions interchangeably so that fresh ribs of the reamer maybe brought into the region which is active for bevelling the pipe, if,after long use, such bevelling operates to dull the reaming tool. Bymaking two slots in the lever at right angles to each other, or bymaking the-boss square, the bevelling tool could take any of four activepositions, if desired.

I have referred to the chaser carrying ring mounted on the carriageposts as being of a form which fixedly carries its chasers, or carriesthem adjustably so that the same ring and chasers may be suitable forpipes of different sizes. The adjustable form is illustrated in Fig. '7hereof and includes a ring I28 having perforated ears I 2| adapted tooccupy the ways of the carriage between the webs 12 and ears I3. Thisring has radial grooves occupied by chasers I25. These chasers have pinsI26 occupying cam grooves I21 in a plate-like ring I 28, rotativelymounted on the chaser carrying ring, being retained by a locking ringI28 secured to the relatively stationary ring I28. The chaser carryingring I 28 has an extension I38 on which is mounted a crank I3I,connected by alink I32 to the cam plate I28. A lever I 33 on the crankshaft may move the crank to throw the cam plate in one direction or theother. Ordinarily, one extreme position of the crank sets the chasersfor one size of pipe, while the opposite extreme position sets them forthe next size, which is to have the same pitch of thread.

The link I32 is shown as adjustablyanchored tothe cam plate by means ofa wing nut I35 on a pin' occupying a slot in the cam plate. Theloosening of this nut enables the cam plate to be shifted to an abnormalposition, bringing open ends of the cam grooves into registration withthe chaser pins, so that the chasers may be drawn entirely out of thering I20 and replaced by other chasers. This enables threads ofdifferent pitch to be cut as desired.

By the means described, the same chaser carrying ring unit is efiectivefor two sizes of pipe by merely operating the hand lever I33. Theconstruction could be arranged so that the same ring might be employedfor more than two sizes of pipe by substituting chasers of differentpitch, though I regard it as preferable to employ a different ring foreach pair of sizes. If an unadjustable ring with fixed chasers isemployed, there should be one ring for each size of-pipe.

It will be understood from the description given that the entirecarriage embodiment of the present invention is simple, and that thevarious tools carried by it enable the effective threading, cutting,reaming or bevelling of pipes of all sizes, within the range of thechuck, without changing the position of the pipe in the chuck. Thecutting tool is self-centering and has a similar action on the pipe tothat of an ordinaryhand cutter with a wheel knife which has been foundvery satisfactory in practice. The simple reaming device shown isnormally out of the way and does not obstruct any of the otheroperations, but is available whenever desired, both for internal reamingand external bevelling.

The herein disclosed and above described pipecutting arrangement per sehas been made the subject of a divisional application, Serial No.77,010, filed April 29, 1936, and the reaming and bevelling arrangementper se of application Serial No. 77,011 of even date.

I claim:

l. The combination of a frame, a rotatable chunk carried thereby, amovable carriage on the frame, a pair of posts rigidly supported by thecarriage standing respectively in front of and behind the chuck axissufficiently to allow the passage of the pipe between the standards, aring carrying tools adapted to engage a pipe extending between theposts, and means for detachably mounting it on the two posts at oppositeregions substantially diametrally of the ring.

2. The combination of a frame, a rotatable chuck carried thereby, amovable carriage on the frame, a pair of posts rigidly supported by thecarriage standing respectively in front of and behind the chuck axissufiiciently to allow the passage of the pipe between the posts, athreading device and a cutting device both R mounted on the posts, andat opposite regions relative to the chuck axis, one of said devicesbeing on that face of the posts which is toward the chuck and the otherdevice on the face of the posts. which is away from the chuck.

3. The combination of a frame, a rotary chuck carried thereby, aslidable carriage on. the frame, said carriage having a pair of uprightposts on opposite sides of the chuck axis, transverse heads on saidposts, each head having a orizontal guide-way on one side and projectingmeans on the other side, a pipe-cutting device which is free- 1yslidably mounted in the horizontal guideways for centering with respectto the pipe, and a chaser-carrying ring removably but stationarilymounted on said projecting means.

ROBERT E. PEALER.

